Added more information on the differences between the htmllib and HTMLParser
modules.
diff --git a/Doc/lib/libsgmllib.tex b/Doc/lib/libsgmllib.tex
index 5fe0c8d..3699d24 100644
--- a/Doc/lib/libsgmllib.tex
+++ b/Doc/lib/libsgmllib.tex
@@ -10,8 +10,9 @@
basis for parsing text files formatted in SGML (Standard Generalized
Mark-up Language). In fact, it does not provide a full SGML parser
--- it only parses SGML insofar as it is used by HTML, and the module
-only exists as a base for the \refmodule{htmllib}\refstmodindex{htmllib}
-module.
+only exists as a base for the \refmodule{htmllib} module. Another
+HTML parser which supports XHTML and offers a somewhat different
+interface is available in the \refmodule{HTMLParser} module.
\begin{classdesc}{SGMLParser}{}